The Wirthmuller isomorphism revisited

J. Peter May

We show how the formal Wirthmuller isomorphism theorem
simplifies the proof of the Wirthmuller isomorphism in equivariant
stable
homotopy theory. Other examples from equivariant stable homotopy theory
show
that the hypotheses of the formal Wirthmuller and formal Grothendieck
isomorphism theorems cannot be weakened.